Sewing-machine presser-foot holder.



No. 747,165. PATENI'ED DEC. 15, 1903.

1 J. M. GREIST.

SEWING MACHINE PRESSEE FOOT HOLDER.

APPLICATION FILED APR.14, 1903.

K0 MODEL.

WITNESS UNITED TATES Patented fieoember 15, 1903.

PATENT FFICE.

SEWlNG-MACHINE PRESSER-FOOT HOLDER.

SPECIFICATION forming part of Letters Patent No. 747,165, dated December 15, 1903.

Application filed April 14, 1903. Serial No. 152,606. (No model.)

To all whom it may concern:

Beit known that I,JOHN M. GREIsT,a citizen of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented certain newand useful Improvementsin Sewing-Machine Presser- Foot Holders, of which the following is a specification, reference being had therein to the accom panying drawings.

This invention has for its object to provide a simple device whereby a sewing-machine presser-footmay be conveniently and quickly placed in or removed from working position on a sewing-machine, whether the said foot be an ordinary presser-foot or whether it be an attachment presser-foot such as is used in connection with hemmers, binders, rufflers, tuck-markers, and the like.

To this end the improved presser-foot-holdin g device comprises a clamping-stud longitudinally movable in a transverse socket or hole near the lower end of the presser-bar, said stud having at one end a head to impinge against the shank of the presser foot and being threaded at its other end for engagement with a stud or clamping-nut. The shank of the presser-foot is preferably provided with a buttonhole-slot, the larger end of which will enable said shank to he slipped over the head of the clamping-stud and the smaller part of which slot fits somewhat closely the shank of said stud, so that when the set or clamping nut is loosened to release the clamping-stud (which is preferably on the front side of the presser-bar) the presser-foot may be quickly and readily removed from working position.

In the accompanying drawings, Figure 1 is a front view of a presser-foot and the lower part of a presser-bar embodying the invention with the presser-foot in cross-section. Fig. 2 is a side view of the same. Fig. 3 is a horizontal section on line 3 3, Fig. 2; and Fig. 4 is a vertical section on line 4 4, Fig. 1. Fig. 5 illustrates a slightly-modified form of presser-foot shank.

Referring to the drawings, a denotes a presser-bar provided near its lower end with a transverse hole or socket, in which loosely but somewhat closely fits a clamping-stud I), having a threaded portion which is engaged by a set or clamping nut 0, the shoulder of which impinges against a flattened portion or seat at the lower end of the pressure-bar and which nut is preferably provided with a small flange 0', extending into an undercut notch or recess a, formed in the presser-bar.

. The clamping-stud b is provided at its outer end with a head I), and the shank d of the presser-foot e is provided with a buttonholeslot f, the larger upper portion of which is of a size to pass freely over the said head b of the said stud b and the smaller lower portion of which slot is of a size to fit the neck of the'said stud somewhat closely, while the sides of said slot will be overlapped by the said head I). The notch or recess ct, entered by one edge of the flange c on the nut 0, prevents endwise movement of the said nut when the latter is turned to loosen the clampingstud. To prevent the stud b from turning in its socket in the resser-bar or from getting out of the same, a small screw 9 is tapped in the lower end of the presser-bar, and the upper end of said screw engages a small notch or flattened portion of the shank of the stud b in such a manner as to prevent said stud from turning, while permitting it to have a limited endwise movement in its clamping or unclamping operation.

The construction just described and in which the clamping-stud is preferably so arranged that its clamping-head will be on the front side of the presser-bar is particularly convenient in that it permits the presser-foot to be attached to or removed from the front side of the presser-bar, which is the most convenient and accessible manner for attaching a presser-foot to a presser-bar, particularly where the presser-foot is an attachment presser-foot. The present construction is also particularly well adapted for the'attachment of a presser-foot directly to the lower end of a round presser-bar or a presser-bar having a rounded face or lower end without requiring any intermediate clamping block or device, and in such direct attachment to a round presser-bar the shank of the presser-foot will be curved transversely, or in cross-section, to correspond approximately to the curvature of the presser-bar, so as to make a solid fit when the presser-foot is clamped in place, such curvature of the inner face of the presser-foot being preferably, however, mathematically on the radius of a circle of slightly less diameter than the radius'of the circle corresponding to the diameter of the presserbar, in order that the clamping action at the outer sides of the presser-foot shank will be greatest when the clamping-stud is tightened by the set-nut.

While the shank of the presser-foot is preferably provided with a buttonhole-slot, as more clearly shown in Fig. 1, the invention is not to be understood as being limited to this particular form of slot in the presser- 'foot shank, as a plain open-ended slot permitting the shank of the presser-foot to he slipped endwise upward under the head of the clamping-stud might be employed, this modification of the invention beingillustrated in Fig. 5, in which the presser-foot shank is shown as having an open-ended slot f.

Having thus described my invention, I

claim and desire to secure by Letter Patent- A presser-foot-holding device consisting of a presser-bar having a rounded lower end and provided with a hole or socket, in combination with a clamping-stud in said hole or socket and having a head at one end and screw-threaded at its other end, a presserfoot shank which is curved transversely to fit against a rounded portion of the presser- JOHN M. GREIST.

Witnesses:

P. R. GREIST, W. O. GREIST. 

